#include "ngx_ngim_util.h"


ssize_t 
ngx_ngim_recv_peek(ngx_connection_t *c, u_char *buf, size_t size)
{
  ssize_t       n;
  ngx_err_t     err;
  ngx_event_t  *rev;

  rev = c->read;
  do {
        n = recv(c->fd, buf, size, MSG_PEEK);

        ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
                       "recv_peek: fd:%d %d of %d", c->fd, n, size);

        if (n == 0) {
            rev->ready = 0;
            rev->eof = 1;
            return n;

        } else if (n > 0) {

            if ((size_t) n < size
                && !(ngx_event_flags & NGX_USE_GREEDY_EVENT))
            {
                rev->ready = 0;
            }

            return n;
        }

        err = ngx_socket_errno;

        if (err == NGX_EAGAIN || err == NGX_EINTR) {
            ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
                           "recv() not ready");
            n = NGX_AGAIN;

        } else {
            n = ngx_connection_error(c, err, "recv() failed");
            break;
        }

    } while (err == NGX_EINTR);
            
    rev->ready = 0;

    if (n == NGX_ERROR) {
        rev->error = 1;
    }

    return n;
}
